Damage from Chemical Exposure Passed Down for Generations

New research has shown that exposure to commonly used chemicals causes changes in rats that are passed down through multiple generations.

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“We are now in the third human generation since the start of the chemical revolution, since humans have been exposed to these kinds of toxins,” says David Crews, co-author of the study and a researcher at the University of Texas. “This is the animal model of that.”

“The ancestral exposure of your great grandmother alters your brain development to then respond to stress differently,” says Michael Skinner, co-author and a researcher at Washington State University. “We did not know a stress response could be programmed by your ancestors’ environmental exposures.”